Bypass Switch Reduces Insertion Loss in Multi-Band UE
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Solution Overview
Problem
Wireless communication networks face interference and performance degradation due to signal path insertion loss in multiple frequency band operations, particularly in single frequency band modes, which affects both downlink and uplink transmissions.
Innovation Solution
The implementation of a bypass switch to route uplink signals around multiplexers such as diplexers, triplexers, or quadplexers in user equipment (UE) reduces insertion loss by eliminating frequency isolation stages, thereby improving signal coverage and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a multiplexer (diplexer, triplexer, or quadplexer) is used to route uplink signals in multi-band operation, then frequency isolation between bands is achieved, but insertion loss increases and signal coverage deteriorates
Solution Approach 1:
The patent extracts the multiplexer from the signal path for single-band operations, removing the source of insertion loss while maintaining frequency isolation capability when needed. The bypass switch enables selective removal of the multiplexer from the uplink signal path, directly resolving the contradiction between frequency isolation and insertion loss.
Solution Approach 2:
The patent implements dynamic switching between two operational modes: single-band mode where the multiplexer is bypassed to minimize insertion loss, and multi-band mode where the multiplexer is engaged for frequency isolation. This dynamic reconfiguration allows the system to adapt to different operational requirements, resolving the static contradiction between isolation and loss.
2Object-affected harmful factors
If a multiplexer is used to isolate frequencies in multi-band mode, then interference between bands is reduced, but signal degradation increases
Solution Approach 1:
The patent removes the multiplexer from the signal path during single-band operations, eliminating the insertion loss and signal degradation caused by the multiplexer while maintaining frequency isolation capability when multi-band operation is required. This selective extraction directly addresses the contradiction between interference reduction and signal quality.
3Object-affected harmful factors
If frequency isolation stages are included in the signal path, then band separation is achieved, but signal coverage is reduced
Solution Approach 1:
The patent dynamically reconfigures the signal path based on operational mode. In single-band mode, the bypass switch routes signals around the multiplexer, maximizing signal coverage. In multi-band mode, the multiplexer is engaged to provide band separation. This dynamic adaptation resolves the contradiction between separation and coverage.
Data Source
AI summary
A multi-band user equipment (UE) is configured to operate in a single frequency band mode or a multiple frequency band mode. When operating in a single frequency band mode, the UE activates a bypass switch to route uplink signals of a first band around a multiplexer and reduce the insertion loss for the band.